(19)

(11)

EP 2 069 405 A2

(12)

(88) Date of publication A3: 30.10.2008 (43) Date of publication: 17.06.2009 Bulletin 2009/25 (21) Application number: 07812701.6 (22) Date of filing: 09.07.2007

(51) International Patent Classification (IPC):  C08B 3/00(2006.01) (86) International application number: PCT/US2007/073006 (87) International publication number: WO 2008/036452 (27.03.2008 Gazette 2008/13)

(84) Designated Contracting States: AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IS IT LI LT LU LV MC MT NL PL PT RO SE SI SK TR Designated Extension States: AL BA HR MK RS (30) Priority: 19.09.2006 US 845664 P 04.12.2006 US 566250 (71) Applicant: Celanese Acetate LLC Dallas, TX 75234 (US)	(72) Inventors: WANG, Linfu Blacksburg, VA 24060 (US) KIZER, Lawton, E. Blacksburg, VA 24060 (US) SAMZ, Frederick, C. Blacksburg, VA 24060 (US) STOGNER, Henry, P. Bluefield, WV 24701 (US) TONEY II, Charles, E. Christiansburg, VA 24073 (US) (74) Representative: Luderschmidt, Schüler & Partner  Patentanwälte John-F.-Kennedy-Strasse 4 65189 Wiesbaden 65189 Wiesbaden (DE)